1 /* 2 * Copyright (C) 2016 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.cts.util; 18 19 import android.app.WallpaperManager; 20 import android.content.Context; 21 import android.graphics.Bitmap; 22 import android.graphics.Bitmap.CompressFormat; 23 import android.graphics.Color; 24 25 import java.io.ByteArrayInputStream; 26 import java.io.ByteArrayOutputStream; 27 import java.lang.reflect.Method; 28 import java.util.Random; 29 30 public class BitmapUtils { BitmapUtils()31 private BitmapUtils() {} 32 33 // Compares two bitmaps by pixels. compareBitmaps(Bitmap bmp1, Bitmap bmp2)34 public static boolean compareBitmaps(Bitmap bmp1, Bitmap bmp2) { 35 if (bmp1 == bmp2) { 36 return true; 37 } 38 39 if (bmp1 == null || bmp2 == null) { 40 return false; 41 } 42 43 if ((bmp1.getWidth() != bmp2.getWidth()) || (bmp1.getHeight() != bmp2.getHeight())) { 44 return false; 45 } 46 47 for (int i = 0; i < bmp1.getWidth(); i++) { 48 for (int j = 0; j < bmp1.getHeight(); j++) { 49 if (bmp1.getPixel(i, j) != bmp2.getPixel(i, j)) { 50 return false; 51 } 52 } 53 } 54 return true; 55 } 56 generateRandomBitmap(int width, int height)57 public static Bitmap generateRandomBitmap(int width, int height) { 58 final Bitmap bmp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); 59 final Random generator = new Random(); 60 for (int x = 0; x < width; x++) { 61 for (int y = 0; y < height; y++) { 62 bmp.setPixel(x, y, generator.nextInt(Integer.MAX_VALUE)); 63 } 64 } 65 return bmp; 66 } 67 generateWhiteBitmap(int width, int height)68 public static Bitmap generateWhiteBitmap(int width, int height) { 69 final Bitmap bmp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); 70 for (int x = 0; x < width; x++) { 71 for (int y = 0; y < height; y++) { 72 bmp.setPixel(x, y, Color.WHITE); 73 } 74 } 75 return bmp; 76 } 77 getWallpaperBitmap(Context context)78 public static Bitmap getWallpaperBitmap(Context context) throws Exception { 79 WallpaperManager wallpaperManager = WallpaperManager.getInstance(context); 80 Class<?> noparams[] = {}; 81 Class<?> wmClass = wallpaperManager.getClass(); 82 Method methodGetBitmap = wmClass.getDeclaredMethod("getBitmap", noparams); 83 return (Bitmap) methodGetBitmap.invoke(wallpaperManager, null); 84 } 85 bitmapToInputStream(Bitmap bmp)86 public static ByteArrayInputStream bitmapToInputStream(Bitmap bmp) { 87 final ByteArrayOutputStream bos = new ByteArrayOutputStream(); 88 bmp.compress(CompressFormat.PNG, 0 /*ignored for PNG*/, bos); 89 byte[] bitmapData = bos.toByteArray(); 90 return new ByteArrayInputStream(bitmapData); 91 } 92 } 93