1 /* 2 * Copyright (C) 2015 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 17 package com.android.camera.captureintent; 18 19 import android.graphics.Bitmap; 20 import android.graphics.BitmapFactory; 21 import android.graphics.Matrix; 22 23 public class PictureDecoder { 24 /** 25 * Decodes a jpeg byte array into a Bitmap object. 26 * 27 * @param data a byte array of jpeg data 28 * @param downSampleFactor down-sample factor 29 * @param pictureOrientation The picture orientation in degrees. 30 * @param needMirror Whether the bitmap should be flipped horizontally. 31 * @return decoded and down-sampled bitmap 32 */ 33 public static Bitmap decode( 34 byte[] data, int downSampleFactor, int pictureOrientation, boolean needMirror) { 35 // Downsample the image 36 final BitmapFactory.Options opts = new BitmapFactory.Options(); 37 opts.inSampleSize = downSampleFactor; 38 final Bitmap pictureBitmap = BitmapFactory.decodeByteArray(data, 0, data.length, opts); 39 if (pictureOrientation == 0 && !needMirror) { 40 return pictureBitmap; 41 } 42 43 Matrix m = new Matrix(); 44 // Rotate if needed. 45 if (pictureOrientation != 0) { 46 m.setRotate(pictureOrientation); 47 } 48 // Flip horizontally if needed. 49 if (needMirror) { 50 m.postScale(-1f, 1f); 51 } 52 return Bitmap.createBitmap( 53 pictureBitmap, 0, 0, pictureBitmap.getWidth(), pictureBitmap.getHeight(), m, false); 54 } 55 } 56
