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 import android.util.Log;
19 
20 /**
21  * This class does an exact comparison of the pixels in a bitmap.
22  */
23 public class ExactComparer extends BitmapComparer {
24     private static final String TAG = "ExactComparer";
25 
26     /**
27      * This method does an exact 1 to 1 comparison of the two bitmaps
28      */
verifySame(int[] ideal, int[] given, int offset, int stride, int width, int height)29     public boolean verifySame(int[] ideal, int[] given, int offset, int stride, int width,
30             int height) {
31         int count = 0;
32 
33         for (int y = 0 ; y < height ; y++) {
34             for (int x = 0 ; x < width ; x++) {
35                 int index = indexFromXAndY(x, y, stride, offset);
36                 if (ideal[index] != given[index]) {
37                     if (count < 50) {
38                         Log.d(TAG, "Failure on position x = " + x + " y = " + y);
39                         Log.d(TAG, "Expected color : " + Integer.toHexString(ideal[index]) +
40                                 " given color : " + Integer.toHexString(given[index]));
41                     }
42                     count++;
43                 }
44             }
45         }
46         Log.d(TAG, "Number of different pixels : " + count);
47 
48         return (count == 0);
49     }
50 }
51