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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.gallery3d.data;
import com.android.gallery3d.app.GalleryApp;
import com.android.gallery3d.common.BitmapUtils;
import com.android.gallery3d.data.ImageCacheService.ImageData;
import com.android.gallery3d.util.ThreadPool.Job;
import com.android.gallery3d.util.ThreadPool.JobContext;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
abstract class ImageCacheRequest implements Job<Bitmap> {
private static final String TAG = "ImageCacheRequest";
protected GalleryApp mApplication;
private Path mPath;
private int mType;
private int mTargetSize;
public ImageCacheRequest(GalleryApp application,
Path path, int type, int targetSize) {
mApplication = application;
mPath = path;
mType = type;
mTargetSize = targetSize;
}
public Bitmap run(JobContext jc) {
String debugTag = mPath + "," +
((mType == MediaItem.TYPE_THUMBNAIL) ? "THUMB" :
(mType == MediaItem.TYPE_MICROTHUMBNAIL) ? "MICROTHUMB" : "?");
ImageCacheService cacheService = mApplication.getImageCacheService();
ImageData data = cacheService.getImageData(mPath, mType);
if (jc.isCancelled()) return null;
if (data != null) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
Bitmap bitmap = DecodeUtils.requestDecode(jc, data.mData,
data.mOffset, data.mData.length - data.mOffset, options);
if (bitmap == null && !jc.isCancelled()) {
Log.w(TAG, "decode cached failed " + debugTag);
}
return bitmap;
} else {
Bitmap bitmap = onDecodeOriginal(jc, mType);
if (jc.isCancelled()) return null;
if (bitmap == null) {
Log.w(TAG, "decode orig failed " + debugTag);
return null;
}
if (mType == MediaItem.TYPE_MICROTHUMBNAIL) {
bitmap = BitmapUtils.resizeDownAndCropCenter(bitmap,
mTargetSize, true);
} else {
bitmap = BitmapUtils.resizeDownBySideLength(bitmap,
mTargetSize, true);
}
if (bitmap == null) {
return null;
}
if (jc.isCancelled()) return null;
byte[] array = BitmapUtils.compressBitmap(bitmap);
if (array == null) {
return null;
}
if (jc.isCancelled()) return null;
cacheService.putImageData(mPath, mType, array);
return bitmap;
}
}
public abstract Bitmap onDecodeOriginal(JobContext jc, int targetSize);
}
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