Sunny Goyal
6a1e95a3df
> WallpaperPicker can still depend on launcher code, but not the other way round. Change-Id: I93a07f985c3955c638a68a5fad9c09b184a879b9
82 lines
2.8 KiB
Java
82 lines
2.8 KiB
Java
/*
|
|
* 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.common;
|
|
|
|
import android.content.Context;
|
|
import android.content.res.Resources;
|
|
import android.net.Uri;
|
|
import android.util.Log;
|
|
|
|
import com.android.gallery3d.exif.ExifInterface;
|
|
|
|
import java.io.BufferedInputStream;
|
|
import java.io.IOException;
|
|
import java.io.InputStream;
|
|
|
|
public class BitmapUtils {
|
|
|
|
private static final String TAG = "BitmapUtils";
|
|
|
|
// Find the min x that 1 / x >= scale
|
|
public static int computeSampleSizeLarger(float scale) {
|
|
int initialSize = (int) Math.floor(1f / scale);
|
|
if (initialSize <= 1) return 1;
|
|
|
|
return initialSize <= 8
|
|
? Utils.prevPowerOf2(initialSize)
|
|
: initialSize / 8 * 8;
|
|
}
|
|
|
|
public static int getRotationFromExif(Context context, Uri uri) {
|
|
return BitmapUtils.getRotationFromExifHelper(null, 0, context, uri);
|
|
}
|
|
|
|
public static int getRotationFromExif(Resources res, int resId) {
|
|
return BitmapUtils.getRotationFromExifHelper(res, resId, null, null);
|
|
}
|
|
|
|
private static int getRotationFromExifHelper(Resources res, int resId, Context context, Uri uri) {
|
|
ExifInterface ei = new ExifInterface();
|
|
InputStream is = null;
|
|
BufferedInputStream bis = null;
|
|
try {
|
|
if (uri != null) {
|
|
is = context.getContentResolver().openInputStream(uri);
|
|
bis = new BufferedInputStream(is);
|
|
ei.readExif(bis);
|
|
} else {
|
|
is = res.openRawResource(resId);
|
|
bis = new BufferedInputStream(is);
|
|
ei.readExif(bis);
|
|
}
|
|
Integer ori = ei.getTagIntValue(ExifInterface.TAG_ORIENTATION);
|
|
if (ori != null) {
|
|
return ExifInterface.getRotationForOrientationValue(ori.shortValue());
|
|
}
|
|
} catch (IOException e) {
|
|
Log.w(TAG, "Getting exif data failed", e);
|
|
} catch (NullPointerException e) {
|
|
// Sometimes the ExifInterface has an internal NPE if Exif data isn't valid
|
|
Log.w(TAG, "Getting exif data failed", e);
|
|
} finally {
|
|
Utils.closeSilently(bis);
|
|
Utils.closeSilently(is);
|
|
}
|
|
return 0;
|
|
}
|
|
}
|