FileBitmapHunter.java

/*
 * Copyright (C) 2013 Square, Inc.
 *
 * 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.squareup.picasso;

import android.annotation.TargetApi;
import android.content.Context;
import android.graphics.Bitmap;
import android.media.ExifInterface;
import android.net.Uri;
import android.os.Build;
import java.io.IOException;

import static android.media.ExifInterface.ORIENTATION_NORMAL;
import static android.media.ExifInterface.ORIENTATION_ROTATE_180;
import static android.media.ExifInterface.ORIENTATION_ROTATE_270;
import static android.media.ExifInterface.ORIENTATION_ROTATE_90;
import static android.media.ExifInterface.TAG_ORIENTATION;

class FileBitmapHunter extends ContentStreamBitmapHunter {

	@SuppressWarnings("rawtypes")
	FileBitmapHunter(Context context, Picasso picasso, Dispatcher dispatcher,
			Cache cache, Stats stats, Action action) {
		super(context, picasso, dispatcher, cache, stats, action);
	}

	@Override
	Bitmap decode(Request data) throws IOException {
		setExifRotation(getFileExifRotation(data.uri));
		return super.decode(data);
	}

	@TargetApi(Build.VERSION_CODES.ECLAIR)
	static int getFileExifRotation(Uri uri) throws IOException {
		ExifInterface exifInterface = new ExifInterface(uri.getPath());
		int orientation = exifInterface.getAttributeInt(TAG_ORIENTATION,
				ORIENTATION_NORMAL);
		switch (orientation) {
		case ORIENTATION_ROTATE_90:
			return 90;
		case ORIENTATION_ROTATE_180:
			return 180;
		case ORIENTATION_ROTATE_270:
			return 270;
		default:
			return 0;
		}
	}
}