1/* 2 * Copyright (C) 2014 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 com.android.layoutlib.bridge.impl; 18 19import com.android.ide.common.rendering.api.LayoutLog; 20import com.android.layoutlib.bridge.Bridge; 21 22import android.graphics.BlendComposite; 23import android.graphics.BlendComposite.BlendingMode; 24import android.graphics.PorterDuff; 25import android.graphics.PorterDuff.Mode; 26import android.graphics.PorterDuffColorFilter_Delegate; 27import android.graphics.PorterDuffXfermode_Delegate; 28 29import java.awt.AlphaComposite; 30import java.awt.Composite; 31 32/** 33 * Provides various utility methods for {@link PorterDuffColorFilter_Delegate} and {@link 34 * PorterDuffXfermode_Delegate}. 35 */ 36public final class PorterDuffUtility { 37 38 private static final int MODES_COUNT = Mode.values().length; 39 40 // Make the class non-instantiable. 41 private PorterDuffUtility() { 42 } 43 44 /** 45 * Convert the porterDuffMode from the framework to its corresponding enum. This defaults to 46 * {@link Mode#SRC_OVER} for invalid modes. 47 */ 48 public static Mode getPorterDuffMode(int porterDuffMode) { 49 if (porterDuffMode >= 0 && porterDuffMode < MODES_COUNT) { 50 return PorterDuff.intToMode(porterDuffMode); 51 } 52 Bridge.getLog().error(LayoutLog.TAG_BROKEN, 53 String.format("Unknown PorterDuff.Mode: %1$d", porterDuffMode), null); 54 assert false; 55 return Mode.SRC_OVER; 56 } 57 58 /** 59 * A utility method to get the {@link Composite} that represents the filter for the given 60 * PorterDuff mode and the alpha. Defaults to {@link Mode#SRC_OVER} for invalid modes. 61 */ 62 public static Composite getComposite(Mode mode, int alpha255) { 63 float alpha1 = alpha255 != 0xFF ? alpha255 / 255.f : 1.f; 64 switch (mode) { 65 case CLEAR: 66 return AlphaComposite.getInstance(AlphaComposite.CLEAR, alpha1); 67 case SRC: 68 return AlphaComposite.getInstance(AlphaComposite.SRC, alpha1); 69 case DST: 70 return AlphaComposite.getInstance(AlphaComposite.DST, alpha1); 71 case SRC_OVER: 72 return AlphaComposite.getInstance(AlphaComposite.SRC_OVER, alpha1); 73 case DST_OVER: 74 return AlphaComposite.getInstance(AlphaComposite.DST_OVER, alpha1); 75 case SRC_IN: 76 return AlphaComposite.getInstance(AlphaComposite.SRC_IN, alpha1); 77 case DST_IN: 78 return AlphaComposite.getInstance(AlphaComposite.DST_IN, alpha1); 79 case SRC_OUT: 80 return AlphaComposite.getInstance(AlphaComposite.SRC_OUT, alpha1); 81 case DST_OUT: 82 return AlphaComposite.getInstance(AlphaComposite.DST_OUT, alpha1); 83 case SRC_ATOP: 84 return AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, alpha1); 85 case DST_ATOP: 86 return AlphaComposite.getInstance(AlphaComposite.DST_ATOP, alpha1); 87 case XOR: 88 return AlphaComposite.getInstance(AlphaComposite.XOR, alpha1); 89 case DARKEN: 90 return BlendComposite.getInstance(BlendingMode.DARKEN, alpha1); 91 case LIGHTEN: 92 return BlendComposite.getInstance(BlendingMode.LIGHTEN, alpha1); 93 case MULTIPLY: 94 return BlendComposite.getInstance(BlendingMode.MULTIPLY, alpha1); 95 case SCREEN: 96 return BlendComposite.getInstance(BlendingMode.SCREEN, alpha1); 97 case ADD: 98 return BlendComposite.getInstance(BlendingMode.ADD, alpha1); 99 case OVERLAY: 100 return BlendComposite.getInstance(BlendingMode.OVERLAY, alpha1); 101 default: 102 Bridge.getLog().fidelityWarning(LayoutLog.TAG_BROKEN, 103 String.format("Unsupported PorterDuff Mode: %1$s", mode.name()), 104 null, null /*data*/); 105 106 return AlphaComposite.getInstance(AlphaComposite.SRC_OVER, alpha1); 107 } 108 } 109} 110