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1 #!/usr/bin/python2.4 | 1 # Copyright (c) 2011 The Chromium Authors. All rights reserved. |
2 # Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | |
3 # Use of this source code is governed by a BSD-style license that can be | 2 # Use of this source code is governed by a BSD-style license that can be |
4 # found in the LICENSE file. | 3 # found in the LICENSE file. |
5 | 4 |
6 """Compare two images for equality.""" | 5 """Compare two images for equality.""" |
7 | 6 |
8 from PIL import Image | 7 from PIL import Image |
9 from PIL import ImageChops | 8 from PIL import ImageChops |
10 | 9 |
11 | 10 |
12 def Compare(file1, file2, **kwargs): | 11 def Compare(file1, file2, **kwargs): |
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29 if im1.size != im2.size: | 28 if im1.size != im2.size: |
30 return ("The images are of different size (%s vs %s)" % | 29 return ("The images are of different size (%s vs %s)" % |
31 (im1.size, im2.size), im1) | 30 (im1.size, im2.size), im1) |
32 | 31 |
33 diff = ImageChops.difference(im1, im2) | 32 diff = ImageChops.difference(im1, im2) |
34 | 33 |
35 if max(diff.getextrema()) != (0, 0): | 34 if max(diff.getextrema()) != (0, 0): |
36 return ("The images differ", diff) | 35 return ("The images differ", diff) |
37 else: | 36 else: |
38 return None | 37 return None |
39 | |
40 | |
41 | |
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