1 /* 2 * Copyright (C) 2017 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 com.android.wallpaper.asset; 17 18 import android.graphics.Point; 19 import android.graphics.Rect; 20 import android.media.ExifInterface; 21 import android.util.Log; 22 23 /** 24 * Rotates crop rectangles for bitmap region operations on rotated images (i.e., with non-normal 25 * EXIF orientation). 26 */ 27 public class CropRectRotator { 28 29 private static final String TAG = "CropRectRotator"; 30 31 /** 32 * Rotates and returns a new crop Rect which is adjusted for the provided EXIF orientation value. 33 */ rotateCropRectForExifOrientation(Point dimensions, Rect srcRect, int exifOrientation)34 public static Rect rotateCropRectForExifOrientation(Point dimensions, Rect srcRect, 35 int exifOrientation) { 36 37 switch (exifOrientation) { 38 case ExifInterface.ORIENTATION_NORMAL: 39 return new Rect(srcRect); 40 case ExifInterface.ORIENTATION_ROTATE_90: 41 return new Rect(srcRect.top, dimensions.x - srcRect.right, srcRect.bottom, 42 dimensions.x - srcRect.left); 43 case ExifInterface.ORIENTATION_ROTATE_180: 44 return new Rect(dimensions.x - srcRect.right, dimensions.y - srcRect.bottom, 45 dimensions.x - srcRect.left, dimensions.y - srcRect.top); 46 case ExifInterface.ORIENTATION_ROTATE_270: 47 return new Rect(dimensions.y - srcRect.bottom, srcRect.left, dimensions.y - srcRect.top, 48 srcRect.right); 49 default: 50 Log.w(TAG, "Unsupported EXIF orientation " + exifOrientation); 51 return new Rect(srcRect); 52 } 53 } 54 } 55