/**
 * Class for creating a template for a simple Java program
 * 
 * @author Pat Troy: troy AT uic DOT edu
 */

import java.awt.Color;

// Note the name of the class in the following line MUST
// match the name of the file. 
public class Lect225g
{
  
  public static void main (String[] args) 
  {
    String fname = FileChooser.pickAFile();
    //System.out.println (fname);
    
    Picture pict = new Picture (fname);
    
    // call method
    makeGrayScale(pict);
    
    pict.explore();
  }
  
  public static void makeGrayScale (Picture pict)
  {
    // store the pixels in an array
    Pixel[]  pixelArray;
    
    pixelArray = pict.getPixels ();
    //System.out.println ("pixelArray lenght: " + pixelArray.length );
      
    // modify each pixel in the picture
    int count;
    for (count = 0 ; count < pixelArray.length; count++)
    {
      // Color c = pixelArray[count].getColor();
      int redAmount, greenAmount, blueAmount, grayAmount;
      Pixel p;
      p = pixelArray[count];
      redAmount = p.getRed();
      greenAmount = p.getGreen();
      blueAmount = p.getBlue ();
      
      //redAmount = 255 - redAmount;
      //greenAmount = 255 - greenAmount;
      //blueAmount = 255 - blueAmount;
      
      grayAmount = (int)((redAmount*0.299) + (greenAmount*0.587) + (blueAmount*0.114));
      
      p.setRed (grayAmount);
      p.setGreen (grayAmount);
      p.setBlue (grayAmount);
      
    }
  }
} // end of class