public class Oct17 {

  static boolean sameSize(Picture p1, Picture p2) {
    if (p1.getHeight() == p2.getHeight()
          && p1.getWidth() == p2.getWidth()) {
      return true ;
    } else {
      return false ;
    }
  }
  
  public static Picture blendPicts(Picture p1, Picture p2) {
    Picture pn = new Picture(p1.getWidth(), p1.getHeight()) ;
    for (int x=0; x<pn.getWidth(); ++x) {
      for (int y = 0; y<pn.getWidth(); ++y) {
        Pixel p1XYpix = p1.getPixel(x, y) ;
        Pixel p2XYpix = p2.getPixel(x, y) ;
        Pixel pnXYpix = pn.getPixel(x, y) ;
        int newRed   = (p1XYpix.getRed()   + p2XYpix.getRed())  /2 ;
        int newGreen = (p1XYpix.getGreen() + p2XYpix.getGreen())/2 ;
        int newBlue  = (p1XYpix.getBlue()  + p2XYpix.getBlue()) / 2 ;
        pnXYpix.setRed(newRed) ;
        pnXYpix.setGreen(newGreen) ;
        pnXYpix.setBlue(newBlue) ;
      }
    }
    return pn ;
  }
  
  
  public static void main(String[] argv) {
    String p1Name = "G:\\Pictures\\colors1.gif" ;
    String p2Name = "G:\\Pictures\\colors2.gif" ;
 
    Picture p1Pict = new Picture(p1Name) ;
    Picture p2Pict = new Picture(p2Name) ;
    System.out.println("p1Pict: " + p1Pict) ;
    System.out.println("p2Pict: " + p2Pict) ;
    if (! sameSize(p1Pict, p2Pict)) {
      System.err.println("Pictures are different sizes!") ;
      System.exit(1) ;
    }

    Picture newPict = blendPicts(p1Pict, p2Pict) ;
    
    p1Pict.show() ;
    p2Pict.show() ;
    newPict.show() ;
    // This has to be done after the show.  So strange
    p1Pict.setTitle("# 1") ;
    p2Pict.setTitle("# 2") ;
    newPict.setTitle("new") ;
  }
}