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############################################################################################
# #
# The code below is from the pycaptcha-0.4 package ( http://releases.navi.cx/pycaptcha/ ) #
# Copyright (c) 2004 Micah Dowty (see COPYING in this directory for further details ) # #
# and adapted by Bertrand Neron, for the purpose of Mobyle # #
# #
############################################################################################
import random
import Image
from Mobyle.Captcha import Pictures
class TiledImage(object):
"""Pick a random image and a random offset, and tile the rendered image with it"""
def __init__(self, imageFactory=Pictures.abstract):
self.tileName = imageFactory.pick()
self.offset = (random.uniform(0, 1),
random.uniform(0, 1))
def render(self, image):
tile = Image.open(self.tileName)
for j in xrange(-1, int(image.size[1] / tile.size[1]) + 1):
for i in xrange(-1, int(image.size[0] / tile.size[0]) + 1):
dest = (int((self.offset[0] + i) * tile.size[0]),
int((self.offset[1] + j) * tile.size[1]))
image.paste(tile, dest)
class CroppedImage(object):
"""Pick a random image, cropped randomly. Source images should be larger than the CAPTCHA."""
def __init__(self, imageFactory=Pictures.nature):
self.imageName = imageFactory.pick()
self.align = (random.uniform(0,1),
random.uniform(0,1))
def render(self, image):
i = Image.open(self.imageName)
image.paste(i, (int(self.align[0] * (image.size[0] - i.size[0])),
int(self.align[1] * (image.size[1] - i.size[1]))))
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