1 /* 2 * Copyright (C) 2009 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.content.pm; 18 19 import android.os.Parcel; 20 import android.os.Parcelable; 21 import android.util.proto.ProtoOutputStream; 22 23 /** 24 * Definition of a single optional hardware or software feature of an Android 25 * device. 26 * <p> 27 * This object is used to represent both features supported by a device and 28 * features requested by an app. Apps can request that certain features be 29 * available as a prerequisite to being installed through the 30 * {@code uses-feature} tag in their manifests. 31 * <p> 32 * Starting in {@link android.os.Build.VERSION_CODES#N}, features can have a 33 * version, which must always be backwards compatible. That is, a device 34 * claiming to support version 3 of a specific feature must support apps 35 * requesting version 1 of that feature. 36 */ 37 public class FeatureInfo implements Parcelable { 38 /** 39 * The name of this feature, for example "android.hardware.camera". If 40 * this is null, then this is an OpenGL ES version feature as described 41 * in {@link #reqGlEsVersion}. 42 */ 43 public String name; 44 45 /** 46 * If this object represents a feature supported by a device, this is the 47 * maximum version of this feature supported by the device. The device 48 * implicitly supports all older versions of this feature. 49 * <p> 50 * If this object represents a feature requested by an app, this is the 51 * minimum version of the feature required by the app. 52 * <p> 53 * When a feature version is undefined by a device, it's assumed to be 54 * version 0. 55 */ 56 public int version; 57 58 /** 59 * Default value for {@link #reqGlEsVersion}; 60 */ 61 public static final int GL_ES_VERSION_UNDEFINED = 0; 62 63 /** 64 * The GLES version used by an application. The upper order 16 bits represent the 65 * major version and the lower order 16 bits the minor version. Only valid 66 * if {@link #name} is null. 67 */ 68 public int reqGlEsVersion; 69 70 /** 71 * Set on {@link #flags} if this feature has been required by the application. 72 */ 73 public static final int FLAG_REQUIRED = 0x0001; 74 75 /** 76 * Additional flags. May be zero or more of {@link #FLAG_REQUIRED}. 77 */ 78 public int flags; 79 80 public FeatureInfo() { 81 } 82 83 public FeatureInfo(FeatureInfo orig) { 84 name = orig.name; 85 version = orig.version; 86 reqGlEsVersion = orig.reqGlEsVersion; 87 flags = orig.flags; 88 } 89 90 @Override 91 public String toString() { 92 if (name != null) { 93 return "FeatureInfo{" 94 + Integer.toHexString(System.identityHashCode(this)) 95 + " " + name + " v=" + version + " fl=0x" + Integer.toHexString(flags) + "}"; 96 } else { 97 return "FeatureInfo{" 98 + Integer.toHexString(System.identityHashCode(this)) 99 + " glEsVers=" + getGlEsVersion() 100 + " fl=0x" + Integer.toHexString(flags) + "}"; 101 } 102 } 103 104 @Override 105 public int describeContents() { 106 return 0; 107 } 108 109 @Override 110 public void writeToParcel(Parcel dest, int parcelableFlags) { 111 dest.writeString(name); 112 dest.writeInt(version); 113 dest.writeInt(reqGlEsVersion); 114 dest.writeInt(flags); 115 } 116 117 /** @hide */ 118 public void writeToProto(ProtoOutputStream proto, long fieldId) { 119 long token = proto.start(fieldId); 120 if (name != null) { 121 proto.write(FeatureInfoProto.NAME, name); 122 } 123 proto.write(FeatureInfoProto.VERSION, version); 124 proto.write(FeatureInfoProto.GLES_VERSION, getGlEsVersion()); 125 proto.write(FeatureInfoProto.FLAGS, flags); 126 proto.end(token); 127 } 128 129 public static final Creator<FeatureInfo> CREATOR = new Creator<FeatureInfo>() { 130 @Override 131 public FeatureInfo createFromParcel(Parcel source) { 132 return new FeatureInfo(source); 133 } 134 @Override 135 public FeatureInfo[] newArray(int size) { 136 return new FeatureInfo[size]; 137 } 138 }; 139 140 private FeatureInfo(Parcel source) { 141 name = source.readString(); 142 version = source.readInt(); 143 reqGlEsVersion = source.readInt(); 144 flags = source.readInt(); 145 } 146 147 /** 148 * This method extracts the major and minor version of reqGLEsVersion attribute 149 * and returns it as a string. Say reqGlEsVersion value of 0x00010002 is returned 150 * as 1.2 151 * @return String representation of the reqGlEsVersion attribute 152 */ 153 public String getGlEsVersion() { 154 int major = ((reqGlEsVersion & 0xffff0000) >> 16); 155 int minor = reqGlEsVersion & 0x0000ffff; 156 return String.valueOf(major)+"."+String.valueOf(minor); 157 } 158 } 159
