BitmapProcess.java

/**
 * Copyright (c) 2012-2013, Michael Yang 杨福海 (www.yangfuhai.com).
 *
 * 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 net.tsz.afinal.bitmap.core;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Log;

import net.tsz.afinal.bitmap.core.BytesBufferPool.BytesBuffer;
import net.tsz.afinal.bitmap.download.Downloader;

public class BitmapProcess {
	private Downloader mDownloader;
	private BitmapCache mCache;
  private BitmapDecorator mDecorator;
	
	private static final int BYTESBUFFE_POOL_SIZE = 4;
    private static final int BYTESBUFFER_SIZE = 200 * 1024;
    private static final BytesBufferPool sMicroThumbBufferPool = new BytesBufferPool(BYTESBUFFE_POOL_SIZE, BYTESBUFFER_SIZE);

	public BitmapProcess(Downloader downloader,BitmapCache cache) {
		this.mDownloader = downloader;
		this.mCache = cache;
	}

  public BitmapProcess(Downloader downloader,BitmapCache cache, BitmapDecorator decorator) {
    this.mDownloader = downloader;
    this.mCache = cache;
    this.mDecorator = decorator;
  }

	public Bitmap getBitmap(String url, BitmapDisplayConfig config) {
		
		Bitmap bitmap = getFromDisk(url,config);
		
		if(bitmap == null){
			byte[] data = mDownloader.download(url);
			if(data != null && data.length > 0){
        Log.d("afinal", String.format("downloaded! url: %s", url));
				if(config !=null)
					bitmap =  BitmapDecoder.decodeSampledBitmapFromByteArray(data,0,data.length,config.getBitmapWidth(),config.getBitmapHeight());
				else
					return BitmapFactory.decodeByteArray(data,0,data.length);
				
				mCache.addToDiskCache(url, data);
			}
		}

    if(bitmap != null && mDecorator != null) {
      bitmap = mDecorator.decorate(bitmap);
    }
		return bitmap;
	}
	
	
	public Bitmap getFromDisk(String key,BitmapDisplayConfig config) {
        BytesBuffer buffer = sMicroThumbBufferPool.get();
        Bitmap b = null;
        try {
        	boolean found = mCache.getImageData(key, buffer);
            if ( found && buffer.length - buffer.offset > 0) {
    	        if( config != null){
    	            b = BitmapDecoder.decodeSampledBitmapFromByteArray(buffer.data,buffer.offset, buffer.length ,config.getBitmapWidth(),config.getBitmapHeight());
    	        }else{
    	        	b = BitmapFactory.decodeByteArray(buffer.data, buffer.offset, buffer.length);
    	        }
            }
        } finally {
        	sMicroThumbBufferPool.recycle(buffer);
        }
        return b;
    }

	
}