X-Git-Url: https://scm.cri.ensmp.fr/git/Portfolio.git/blobdiff_plain/2da869b2b46179d64c05eaac4081226fdbbbc9ff..e73353500c67453ef9663d67eaeee7dd46c358ee:/Products/Portfolio/Extensions/difference.py

diff --git a/Products/Portfolio/Extensions/difference.py b/Products/Portfolio/Extensions/difference.py
new file mode 100755
index 0000000..6606eff
--- /dev/null
+++ b/Products/Portfolio/Extensions/difference.py
@@ -0,0 +1,35 @@
+# -*- coding: utf-8 -*-
+############################################################
+# Copyright © 2005-2008  Benoît PIN <benoit.pin@ensmp.fr>  #
+# Plinn - http://plinn.org                                 #
+#                                                          #
+# This program is free software; you can redistribute it   #
+# and/or modify it under the terms of the Creative Commons #
+# "Attribution-Noncommercial 2.0 Generic"                  #
+# http://creativecommons.org/licenses/by-nc/2.0/           #
+############################################################
+
+"""
+
+
+"""
+from AccessControl import Unauthorized
+from PIL.Image import new as newImage, open as imgopen, composite
+from PIL.ImageChops import difference
+from cStringIO import StringIO
+
+def diffImage(self, image, image2, mask) :
+	iw, ih = image.size
+	if iw > 800 or ih > 800 :
+		raise Unauthorized, "You are not allowed to get an image larger than 800px"
+	
+	mask = imgopen(StringIO(str(mask)))
+	assert mask.mode=='L', "mask must be in L mode"
+	
+	image2 = imgopen(StringIO(str(image2)))
+	diffImage = difference(image, image2)
+	mergedImage = composite(diffImage, image, mask)
+	
+	box = (0,0) + mergedImage.size
+	
+	image.paste(mergedImage, box)