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 android.uirendering.cts.bitmapcomparers;
17 
18 /**
19  * This abstract class can be used by the tester to implement their own comparison methods
20  */
21 public abstract class BitmapComparer {
22     /**
23      * Compares the two bitmaps given using Java.
24      * @param offset where in the bitmaps to start
25      * @param stride how much to skip between two different rows
26      * @param width the width of the subsection being tested
27      * @param height the height of the subsection being tested
28      * @return
29      */
verifySame(int[] ideal, int[] given, int offset, int stride, int width, int height)30     public abstract boolean verifySame(int[] ideal, int[] given, int offset, int stride, int width,
31             int height);
32 
33     /**
34      * This calculates the position in an array that would represent a bitmap given the parameters.
35      */
indexFromXAndY(int x, int y, int stride, int offset)36     protected static int indexFromXAndY(int x, int y, int stride, int offset) {
37         return x + (y * stride) + offset;
38     }
39 }
40