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 package org.robolectric.shadows.testing.bitmapcomparers; 17 18 /** This abstract class can be used by the tester to implement their own comparison methods */ 19 public abstract class BitmapComparer { 20 /** 21 * Compares the two bitmaps given using Java. 22 * 23 * @param offset where in the bitmaps to start 24 * @param stride how much to skip between two different rows 25 * @param width the width of the subsection being tested 26 * @param height the height of the subsection being tested 27 */ verifySame( int[] ideal, int[] given, int offset, int stride, int width, int height)28 public abstract boolean verifySame( 29 int[] ideal, int[] given, int offset, int stride, int width, int height); 30 31 /** 32 * This calculates the position in an array that would represent a bitmap given the parameters. 33 */ indexFromXAndY(int x, int y, int stride, int offset)34 protected static int indexFromXAndY(int x, int y, int stride, int offset) { 35 return x + (y * stride) + offset; 36 } 37 } 38