1 /*
   2  * Copyright (c) 2007, 2017 Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 package org.jemmy.image.pixel;
  24 
  25 import org.jemmy.Dimension;
  26 
  27 /**
  28  *
  29  * @author shura
  30  */
  31 public class MaxDistanceComparator extends ThresholdComparator{
  32 
  33     /**
  34      *
  35      * @param threshold 
  36      */
  37     public MaxDistanceComparator(double threshold) {
  38         super(0, Math.sqrt(3));
  39         setThreshold(threshold);
  40     }
  41 
  42     /**
  43      *
  44      * @param image1
  45      * @param image2
  46      * @return
  47      */
  48     public boolean compare(Raster image1, Raster image2) {
  49         Dimension size = PixelImageComparator.computeDiffSize(image1, image2);
  50         if (size == null) {
  51             return false;
  52         }
  53         double[] colors1 = new double[image1.getSupported().length];
  54         double[] colors2 = new double[image2.getSupported().length];
  55         double distance = 0;
  56         for (int x = 0; x < size.width; x++) {
  57             for (int y = 0; y < size.height; y++) {
  58                 image1.getColors(x, y, colors1);
  59                 image2.getColors(x, y, colors2);
  60                 distance = Math.max(distance, AverageDistanceComparator.distance(image1.getSupported(), colors1, image2.getSupported(), colors2));
  61             }
  62         }
  63         return distance <= getThreshold();
  64     }
  65 
  66     /**
  67      *
  68      * @return
  69      */
  70     public String getID() {
  71         return MaxDistanceComparator.class.getName() + ":" + getThreshold();
  72     }
  73 }