def showParameters (param1, param2):
  print "Param1 is: ", param1
  print "Param2 is: ", param2
  product = param1 * param2
  print "The product is: ", product
  
def getPicture():
  file = pickAFile ();
  pict = makePicture(file);
  openPictureTool (pict)

def cropImage():
  
  #Allow the user to pick up an image file
  file = pickAFile()

  #print the file name user chose
  print file

  #now convert the image in JES format
  pic = makePicture(file)

  orig_width = getWidth (pic)
  orig_height = getHeight (pic)

  # decide the size of new image
  newWidth = 100
  newHeight = 150

  #now create a new image in JES format
  new_pic = makeEmptyPicture(newWidth, newHeight)

  # now decide starting with which part of image
  # we should crop the image
  start_x = 50
  start_y = 100

  # so we will crop the image starting from pixel
  # at row 100 column 50 and size of the image would be
  # 100 columns and 150 rows.

  for x in range(1, newWidth+1):
    for y in range(1, newHeight+1):

      # make sure y + start_y is less than origHeight
      if (y+start_y > orig_height):
         print "Error in y value"
         print "Current y+stary_y value is: ", y+start_y
         print "Original Height is: ", orig_height
         return
      
      # get pixel from original image
      orig_pixel = getPixel(pic, x+start_x, y+start_y);

      # get pixel from new image
      new_pixel = getPixel(new_pic, x, y);

      # get the color from original pixel
      c = getColor(orig_pixel)

      # set the color of new pixel to c
      setColor(new_pixel, c)

  # Now display the new image
  show(new_pic)

  # save the new image
  writePictureTo(new_pic, pickAFile())



def duplicateHorz():
  #Allow the user to pick up an image file
  file = pickAFile()
  #now convert the image in JES format
  pic = makePicture(file)

  orig_width = getWidth (pic)
  orig_height = getHeight (pic)

  new_pict = makeEmptyPicture (orig_width*2, orig_height)

  for x in range (1, orig_width):
    for y in range (1, orig_height):

      opix = getPixel(pic, x,y)

      npix1 = getPixel (new_pict, x, y)
      npix2 = getPixel (new_pict, x+orig_width, y)

      c = getColor (opix)
      setColor(npix1, c)
      setColor(npix2, c)

  openPictureTool(new_pict)