#
# simple program for image manipulation program 
#
# written by e.bonakdarian  nov 2009
#   - updated nov 2010
#

import Image

#####################################################
def Diag(img, pixel_color): 
   # put a diagonal line across the image in the
   # specified color

   pix_ar = img.load() # load image into 2D array 
   cols = img.size[0]  # number of columns
   rows = img.size[1]  # number of rows

   for col in range(cols):  # our nested loop 
      for row in range(rows):
         if row == col: 
            pix_ar[col, row] = pixel_color




#####################################################            
def main(): 
   # load the image from file 

   im = Image.open('c:/pic.jpg')
   pixel_color = 255, 0, 0 # a red RGB pixel

   Diag(im, pixel_color) 
   im.show()



if __name__ == '__main__':
   main()
   raw_input('<enter> to exit')