#
#  Constants for the size of the image
#
WIDTH = 600
HEIGHT = 400

#
#  Constants for the position of RED, GREEN and BLUE within the list of color
#  components
#
RED = 0
GREEN = 1
BLUE = 2


#
# A function that displays an image
#
# Parameters:
#   x,y: The location of the upper left corner of the image
#   img: The image to draw
#
# Returns: nothing
#
def displayImage(x,y,img):
   #
   # Since the outer list is a list of columns, len(img) is the width
   # of the image.
   #
   # Assuming that each column has the same number of rows in it, len(img[0])
   # is the height of the image.
   #
   # The pixels command expects the data to come in row major order, meaning
   # all the pixels from row 0, then row 2, ...
   #
   print "pixels",x,y,len(img),len(img[0]), # comma to prevent newline
   for j in range(0,len(img[0])):
      for i in range(0,len(img)):
         print int(img[i][j][RED]),int(img[i][j][GREEN]),int(img[i][j][BLUE]),
   print ""


def displayImage2(x,y,img):
   #
   # Since the outer list is a list of columns, len(img) is the width
   # of the image.
   #
   # Assuming that each column has the same number of rows in it, len(img[0])
   # is the height of the image.
   #
   # Output instructions of the form
   #   color r,g,b
   #   pixel x,y
   # drawing the picture from top to bottom
   #
   print "flush false"
   for j in range(0, len(img[0])):
      for i in range(0, len(img)):
         print "color",img[i][j][RED],img[i][j][GREEN],img[i][j][BLUE]
         print "pixel",x+i,x+j
      print "refresh"
   print "flush true"



#
#  Create a new blank image
#
img = []  
for i in range(0, WIDTH):
   img.append([])  #  Add a new column to the image
   for j in range(0, HEIGHT):
      img[i].append([0, 0, 0])  #  Add each row to column i

#
#  Set the pixels in the image to a nice color gradient
#
for i in range(0, WIDTH):
   for j in range(0, HEIGHT):
      img[i][j] = [255 * j / HEIGHT, 192 * j / HEIGHT, 64 * j / HEIGHT]

#displayImage(100,100,img)
displayImage2(100,100,img)