1 /* Copyright 2016 The TensorFlow Authors. All Rights Reserved. 2 3 Licensed under the Apache License, Version 2.0 (the "License"); 4 you may not use this file except in compliance with the License. 5 You may obtain a copy of the License at 6 7 http://www.apache.org/licenses/LICENSE-2.0 8 9 Unless required by applicable law or agreed to in writing, software 10 distributed under the License is distributed on an "AS IS" BASIS, 11 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 See the License for the specific language governing permissions and 13 limitations under the License. 14 ==============================================================================*/ 15 16 package org.tensorflow.demo.env; 17 18 import android.graphics.Bitmap; 19 import android.text.TextUtils; 20 import java.io.Serializable; 21 import java.util.ArrayList; 22 import java.util.List; 23 24 /** 25 * Size class independent of a Camera object. 26 */ 27 public class Size implements Comparable<Size>, Serializable { 28 29 // 1.4 went out with this UID so we'll need to maintain it to preserve pending queries when 30 // upgrading. 31 public static final long serialVersionUID = 7689808733290872361L; 32 33 public final int width; 34 public final int height; 35 Size(final int width, final int height)36 public Size(final int width, final int height) { 37 this.width = width; 38 this.height = height; 39 } 40 Size(final Bitmap bmp)41 public Size(final Bitmap bmp) { 42 this.width = bmp.getWidth(); 43 this.height = bmp.getHeight(); 44 } 45 46 /** 47 * Rotate a size by the given number of degrees. 48 * @param size Size to rotate. 49 * @param rotation Degrees {0, 90, 180, 270} to rotate the size. 50 * @return Rotated size. 51 */ getRotatedSize(final Size size, final int rotation)52 public static Size getRotatedSize(final Size size, final int rotation) { 53 if (rotation % 180 != 0) { 54 // The phone is portrait, therefore the camera is sideways and frame should be rotated. 55 return new Size(size.height, size.width); 56 } 57 return size; 58 } 59 parseFromString(String sizeString)60 public static Size parseFromString(String sizeString) { 61 if (TextUtils.isEmpty(sizeString)) { 62 return null; 63 } 64 65 sizeString = sizeString.trim(); 66 67 // The expected format is "<width>x<height>". 68 final String[] components = sizeString.split("x"); 69 if (components.length == 2) { 70 try { 71 final int width = Integer.parseInt(components[0]); 72 final int height = Integer.parseInt(components[1]); 73 return new Size(width, height); 74 } catch (final NumberFormatException e) { 75 return null; 76 } 77 } else { 78 return null; 79 } 80 } 81 sizeStringToList(final String sizes)82 public static List<Size> sizeStringToList(final String sizes) { 83 final List<Size> sizeList = new ArrayList<Size>(); 84 if (sizes != null) { 85 final String[] pairs = sizes.split(","); 86 for (final String pair : pairs) { 87 final Size size = Size.parseFromString(pair); 88 if (size != null) { 89 sizeList.add(size); 90 } 91 } 92 } 93 return sizeList; 94 } 95 sizeListToString(final List<Size> sizes)96 public static String sizeListToString(final List<Size> sizes) { 97 String sizesString = ""; 98 if (sizes != null && sizes.size() > 0) { 99 sizesString = sizes.get(0).toString(); 100 for (int i = 1; i < sizes.size(); i++) { 101 sizesString += "," + sizes.get(i).toString(); 102 } 103 } 104 return sizesString; 105 } 106 aspectRatio()107 public final float aspectRatio() { 108 return (float) width / (float) height; 109 } 110 111 @Override compareTo(final Size other)112 public int compareTo(final Size other) { 113 return width * height - other.width * other.height; 114 } 115 116 @Override equals(final Object other)117 public boolean equals(final Object other) { 118 if (other == null) { 119 return false; 120 } 121 122 if (!(other instanceof Size)) { 123 return false; 124 } 125 126 final Size otherSize = (Size) other; 127 return (width == otherSize.width && height == otherSize.height); 128 } 129 130 @Override hashCode()131 public int hashCode() { 132 return width * 32713 + height; 133 } 134 135 @Override toString()136 public String toString() { 137 return dimensionsAsString(width, height); 138 } 139 dimensionsAsString(final int width, final int height)140 public static final String dimensionsAsString(final int width, final int height) { 141 return width + "x" + height; 142 } 143 } 144