| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.hardware.camera2.utils; |
| |
| import android.util.Size; |
| |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.List; |
| |
| import static com.android.internal.util.Preconditions.*; |
| |
| /** |
| * Comparator for {@link Size} objects by the area. |
| * |
| * <p>This comparator totally orders by rectangle area. Tie-breaks on width.</p> |
| */ |
| public class SizeAreaComparator implements Comparator<Size> { |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public int compare(Size size, Size size2) { |
| checkNotNull(size, "size must not be null"); |
| checkNotNull(size2, "size2 must not be null"); |
| |
| if (size.equals(size2)) { |
| return 0; |
| } |
| |
| long width = size.getWidth(); |
| long width2 = size2.getWidth(); |
| long area = width * size.getHeight(); |
| long area2 = width2 * size2.getHeight(); |
| |
| if (area == area2) { |
| return (width > width2) ? 1 : -1; |
| } |
| |
| return (area > area2) ? 1 : -1; |
| } |
| |
| /** |
| * Get the largest {@code Size} from the list by comparing each size's area |
| * by each other using {@link SizeAreaComparator}. |
| * |
| * @param sizes a non-{@code null} list of non-{@code null} sizes |
| * @return a non-{@code null} size |
| * |
| * @throws NullPointerException if {@code sizes} or any elements in it were {@code null} |
| */ |
| public static Size findLargestByArea(List<Size> sizes) { |
| checkNotNull(sizes, "sizes must not be null"); |
| |
| return Collections.max(sizes, new SizeAreaComparator()); |
| } |
| } |