public Object getDataElements(int x, int y, int w, int h, Object outData)
public Object getDataElements(int x, int y, Object outData)
  public Object getDataElements(int x, int y, int w, int h,				Object outData)  {    return sampleModel.getDataElements(x-sampleModelTranslateX,				       y-sampleModelTranslateY,				       w, h, outData, dataBuffer);	}