import PIL.Image
import PIL.ImageDraw


width=360
height=width
padding=12
stoneSize=(width-2*padding)/18
yellow=(255,200,0)
white=(255,255,255)
black=(0,0,0)


def createDiagram(board):
	img=PIL.Image.new("RGB",(width,height),yellow)
	canvas=PIL.ImageDraw.Draw(img)

	# grid
	for i in range(19):
		canvas.line((padding,padding+i*stoneSize,width-padding,padding+i*stoneSize),black,1)
		canvas.line((padding+i*stoneSize,padding,padding+i*stoneSize,height-padding),black,1)

	# stars
	radius=2
	for r in range(3,19,6):
		for c in range(3,19,6):
			x=c*stoneSize+padding
			y=r*stoneSize+padding
			canvas.ellipse((x-radius,y-radius,x+radius,y+radius),black)

	# stones
	radius=stoneSize/2
	for (r,row) in enumerate(board):
		for (c,color) in enumerate(row):
			if color=="X" or color=="O":
				x=c*stoneSize+padding
				y=r*stoneSize+padding
				canvas.ellipse((x-radius,y-radius,x+radius,y+radius),black if color=="X" else white)

	return img