code: function Tufu(src){
  	if(!(this instanceof Tufu)){
  		return new Tufu(src);
  	}
  	this.src = src;
  	var bufferData = fs.readFileSync(this.src);
  	this.codec = Tufu.adaptCodec(bufferData);
  	this.imageData = this.codec.decode(bufferData);
  	//set image quality 100%
  	this.quality = 100;
  }
docs: start of Tufu
  @param  {[String]} filePath
  @return {[Tufu]} new instance Tufu