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/*
* Copyright (C) 2013 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.ingest.data;
import android.annotation.TargetApi;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.mtp.MtpDevice;
import android.os.Build;
import android.util.DisplayMetrics;
import android.view.WindowManager;
import com.android.gallery3d.data.Exif;
import com.android.photos.data.GalleryBitmapPool;
/**
* Helper class for fetching bitmaps from MTP devices.
*/
@TargetApi(Build.VERSION_CODES.HONEYCOMB_MR1)
public class MtpBitmapFetch {
private static int sMaxSize = 0;
public static void recycleThumbnail(Bitmap b) {
if (b != null) {
GalleryBitmapPool.getInstance().put(b);
}
}
public static Bitmap getThumbnail(MtpDevice device, IngestObjectInfo info) {
byte[] imageBytes = device.getThumbnail(info.getObjectHandle());
if (imageBytes == null) {
return null;
}
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.length, o);
if (o.outWidth == 0 || o.outHeight == 0) {
return null;
}
o.inBitmap = GalleryBitmapPool.getInstance().get(o.outWidth, o.outHeight);
o.inMutable = true;
o.inJustDecodeBounds = false;
o.inSampleSize = 1;
try {
return BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.length, o);
} catch (IllegalArgumentException e) {
// BitmapFactory throws an exception rather than returning null
// when image decoding fails and an existing bitmap was supplied
// for recycling, even if the failure was not caused by the use
// of that bitmap.
return BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.length);
}
}
public static BitmapWithMetadata getFullsize(MtpDevice device, IngestObjectInfo info) {
return getFullsize(device, info, sMaxSize);
}
public static BitmapWithMetadata getFullsize(MtpDevice device, IngestObjectInfo info,
int maxSide) {
byte[] imageBytes = device.getObject(info.getObjectHandle(), info.getCompressedSize());
if (imageBytes == null) {
return null;
}
Bitmap created;
if (maxSide > 0) {
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.length, o);
int w = o.outWidth;
int h = o.outHeight;
int comp = Math.max(h, w);
int sampleSize = 1;
while ((comp >> 1) >= maxSide) {
comp = comp >> 1;
sampleSize++;
}
o.inSampleSize = sampleSize;
o.inJustDecodeBounds = false;
created = BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.length, o);
} else {
created = BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.length);
}
if (created == null) {
return null;
}
int orientation = Exif.getOrientation(imageBytes);
return new BitmapWithMetadata(created, orientation);
}
public static void configureForContext(Context context) {
DisplayMetrics metrics = new DisplayMetrics();
WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
wm.getDefaultDisplay().getMetrics(metrics);
sMaxSize = Math.max(metrics.heightPixels, metrics.widthPixels);
}
}
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