1 /* 2 * Copyright (C) 2010 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.data; 18 19 import android.graphics.Bitmap; 20 import android.graphics.BitmapFactory; 21 22 import com.android.gallery3d.app.GalleryApp; 23 import com.android.gallery3d.common.BitmapUtils; 24 import com.android.gallery3d.data.BytesBufferPool.BytesBuffer; 25 import com.android.gallery3d.util.ThreadPool.Job; 26 import com.android.gallery3d.util.ThreadPool.JobContext; 27 28 abstract class ImageCacheRequest implements Job<Bitmap> { 29 private static final String TAG = "ImageCacheRequest"; 30 31 protected GalleryApp mApplication; 32 private Path mPath; 33 private int mType; 34 private int mTargetSize; 35 private long mTimeModified; 36 ImageCacheRequest(GalleryApp application, Path path, long timeModified, int type, int targetSize)37 public ImageCacheRequest(GalleryApp application, 38 Path path, long timeModified, int type, int targetSize) { 39 mApplication = application; 40 mPath = path; 41 mType = type; 42 mTargetSize = targetSize; 43 mTimeModified = timeModified; 44 } 45 debugTag()46 private String debugTag() { 47 return mPath + "," + mTimeModified + "," + 48 ((mType == MediaItem.TYPE_THUMBNAIL) ? "THUMB" : 49 (mType == MediaItem.TYPE_MICROTHUMBNAIL) ? "MICROTHUMB" : "?"); 50 } 51 52 @Override run(JobContext jc)53 public Bitmap run(JobContext jc) { 54 ImageCacheService cacheService = mApplication.getImageCacheService(); 55 56 BytesBuffer buffer = MediaItem.getBytesBufferPool().get(); 57 try { 58 boolean found = cacheService.getImageData(mPath, mTimeModified, mType, buffer); 59 if (jc.isCancelled()) return null; 60 if (found) { 61 BitmapFactory.Options options = new BitmapFactory.Options(); 62 options.inPreferredConfig = Bitmap.Config.ARGB_8888; 63 Bitmap bitmap; 64 if (mType == MediaItem.TYPE_MICROTHUMBNAIL) { 65 bitmap = DecodeUtils.decodeUsingPool(jc, 66 buffer.data, buffer.offset, buffer.length, options); 67 } else { 68 bitmap = DecodeUtils.decodeUsingPool(jc, 69 buffer.data, buffer.offset, buffer.length, options); 70 } 71 if (bitmap == null && !jc.isCancelled()) { 72 Log.w(TAG, "decode cached failed " + debugTag()); 73 } 74 return bitmap; 75 } 76 } finally { 77 MediaItem.getBytesBufferPool().recycle(buffer); 78 } 79 Bitmap bitmap = onDecodeOriginal(jc, mType); 80 if (jc.isCancelled()) return null; 81 82 if (bitmap == null) { 83 Log.w(TAG, "decode orig failed " + debugTag()); 84 return null; 85 } 86 87 if (mType == MediaItem.TYPE_MICROTHUMBNAIL) { 88 bitmap = BitmapUtils.resizeAndCropCenter(bitmap, mTargetSize, true); 89 } else { 90 bitmap = BitmapUtils.resizeDownBySideLength(bitmap, mTargetSize, true); 91 } 92 if (jc.isCancelled()) return null; 93 94 byte[] array = BitmapUtils.compressToBytes(bitmap); 95 if (jc.isCancelled()) return null; 96 97 cacheService.putImageData(mPath, mTimeModified, mType, array); 98 return bitmap; 99 } 100 onDecodeOriginal(JobContext jc, int targetSize)101 public abstract Bitmap onDecodeOriginal(JobContext jc, int targetSize); 102 } 103