/*******************************************************************************
 * Copyright 2011-2013 Sergey Tarasevich
 *
 * 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 cn.link.imageloader.decode;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.BitmapFactory.Options;
import cn.link.imageloader.DisplayOptions;
import cn.link.imageloader.assist.ImageSize;
import cn.link.imageloader.assist.ImageSizeUtils;

import java.io.ByteArrayOutputStream;
import java.io.IOException;

/**
 * Decodes images to {@link android.graphics.Bitmap}, scales them to needed size
 *
 * @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
 * @see ImageDecodingInfo
 * @since 1.8.3
 */
public class BaseImageDecoder implements ImageDecoder {
    @Override
    public Bitmap decode(ByteArrayOutputStream out, DisplayOptions options) throws IOException {
        Bitmap bitmap = null;
        Options op = new Options();
        op.inJustDecodeBounds = true;
        bitmap = BitmapFactory.decodeByteArray(out.toByteArray(), 0, out.size(), op);
        ImageSize srcSize = new ImageSize(op.outWidth, op.outHeight);
        op.inSampleSize = ImageSizeUtils.computeImageSampleSize(srcSize,
                options.mTargetSize,
                options.mViewScalType,
                false);
        op.inJustDecodeBounds = false;
        bitmap = BitmapFactory.decodeByteArray(out.toByteArray(), 0, out.size(), op);
        out.close();
        return bitmap;  //ToDo
    }
}