1 /* 2 * Copyright (C) 2013 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.gallery3d.ingest.data; 18 19 import android.annotation.TargetApi; 20 import android.content.Context; 21 import android.graphics.Bitmap; 22 import android.graphics.BitmapFactory; 23 import android.mtp.MtpDevice; 24 import android.os.Build; 25 import android.util.DisplayMetrics; 26 import android.view.WindowManager; 27 28 import com.android.gallery3d.data.Exif; 29 import com.android.photos.data.GalleryBitmapPool; 30 31 /** 32 * Helper class for fetching bitmaps from MTP devices. 33 */ 34 @TargetApi(Build.VERSION_CODES.HONEYCOMB_MR1) 35 public class MtpBitmapFetch { 36 private static int sMaxSize = 0; 37 recycleThumbnail(Bitmap b)38 public static void recycleThumbnail(Bitmap b) { 39 if (b != null) { 40 GalleryBitmapPool.getInstance().put(b); 41 } 42 } 43 getThumbnail(MtpDevice device, IngestObjectInfo info)44 public static Bitmap getThumbnail(MtpDevice device, IngestObjectInfo info) { 45 byte[] imageBytes = device.getThumbnail(info.getObjectHandle()); 46 if (imageBytes == null) { 47 return null; 48 } 49 BitmapFactory.Options o = new BitmapFactory.Options(); 50 o.inJustDecodeBounds = true; 51 BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.length, o); 52 if (o.outWidth == 0 || o.outHeight == 0) { 53 return null; 54 } 55 o.inBitmap = GalleryBitmapPool.getInstance().get(o.outWidth, o.outHeight); 56 o.inMutable = true; 57 o.inJustDecodeBounds = false; 58 o.inSampleSize = 1; 59 try { 60 return BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.length, o); 61 } catch (IllegalArgumentException e) { 62 // BitmapFactory throws an exception rather than returning null 63 // when image decoding fails and an existing bitmap was supplied 64 // for recycling, even if the failure was not caused by the use 65 // of that bitmap. 66 return BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.length); 67 } 68 } 69 getFullsize(MtpDevice device, IngestObjectInfo info)70 public static BitmapWithMetadata getFullsize(MtpDevice device, IngestObjectInfo info) { 71 return getFullsize(device, info, sMaxSize); 72 } 73 getFullsize(MtpDevice device, IngestObjectInfo info, int maxSide)74 public static BitmapWithMetadata getFullsize(MtpDevice device, IngestObjectInfo info, 75 int maxSide) { 76 byte[] imageBytes = device.getObject(info.getObjectHandle(), info.getCompressedSize()); 77 if (imageBytes == null) { 78 return null; 79 } 80 Bitmap created; 81 if (maxSide > 0) { 82 BitmapFactory.Options o = new BitmapFactory.Options(); 83 o.inJustDecodeBounds = true; 84 BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.length, o); 85 int w = o.outWidth; 86 int h = o.outHeight; 87 int comp = Math.max(h, w); 88 int sampleSize = 1; 89 while ((comp >> 1) >= maxSide) { 90 comp = comp >> 1; 91 sampleSize++; 92 } 93 o.inSampleSize = sampleSize; 94 o.inJustDecodeBounds = false; 95 created = BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.length, o); 96 } else { 97 created = BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.length); 98 } 99 if (created == null) { 100 return null; 101 } 102 103 int orientation = Exif.getOrientation(imageBytes); 104 return new BitmapWithMetadata(created, orientation); 105 } 106 configureForContext(Context context)107 public static void configureForContext(Context context) { 108 DisplayMetrics metrics = new DisplayMetrics(); 109 WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE); 110 wm.getDefaultDisplay().getMetrics(metrics); 111 sMaxSize = Math.max(metrics.heightPixels, metrics.widthPixels); 112 } 113 } 114