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 17 package android.graphics; 18 19 import com.android.layoutlib.bridge.impl.DelegateManager; 20 import com.android.tools.layoutlib.annotations.LayoutlibDelegate; 21 22 import java.awt.Graphics2D; 23 24 import libcore.util.NativeAllocationRegistry_Delegate; 25 26 /** 27 * Delegate implementing the native methods of android.graphics.ColorFilter 28 * 29 * Through the layoutlib_create tool, the original native methods of ColorFilter have been replaced 30 * by calls to methods of the same name in this delegate class. 31 * 32 * This class behaves like the original native implementation, but in Java, keeping previously 33 * native data into its own objects and mapping them to int that are sent back and forth between 34 * it and the original ColorFilter class. 35 * 36 * This also serve as a base class for all ColorFilter delegate classes. 37 * 38 * @see DelegateManager 39 * 40 */ 41 public abstract class ColorFilter_Delegate { 42 43 // ---- delegate manager ---- 44 protected static final DelegateManager<ColorFilter_Delegate> sManager = 45 new DelegateManager<ColorFilter_Delegate>(ColorFilter_Delegate.class); 46 private static long sFinalizer = -1; 47 48 // ---- delegate helper data ---- 49 50 // ---- delegate data ---- 51 52 // ---- Public Helper methods ---- 53 54 public static ColorFilter_Delegate getDelegate(long nativeShader) { 55 return sManager.getDelegate(nativeShader); 56 } 57 58 public abstract String getSupportMessage(); 59 60 public boolean isSupported() { 61 return false; 62 } 63 64 public void applyFilter(Graphics2D g, int width, int height) { 65 // This should never be called directly. If supported, the sub class should override this. 66 assert false; 67 } 68 69 // ---- native methods ---- 70 71 @LayoutlibDelegate 72 /*package*/ static long nativeGetFinalizer() { 73 synchronized (ColorFilter_Delegate.class) { 74 if (sFinalizer == -1) { 75 sFinalizer = NativeAllocationRegistry_Delegate.createFinalizer( 76 sManager::removeJavaReferenceFor); 77 } 78 } 79 return sFinalizer; 80 } 81 82 // ---- Private delegate/helper methods ---- 83 } 84
