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Diffstat (limited to 'interlace-frames.py')
-rw-r--r-- | interlace-frames.py | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/interlace-frames.py b/interlace-frames.py new file mode 100644 index 00000000..243e565e --- /dev/null +++ b/interlace-frames.py | |||
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1 | # Copyright (C) 2014 The Android Open Source Project | ||
2 | # | ||
3 | # Licensed under the Apache License, Version 2.0 (the "License"); | ||
4 | # you may not use this file except in compliance with the License. | ||
5 | # You may obtain a copy of the License at | ||
6 | # | ||
7 | # http://www.apache.org/licenses/LICENSE-2.0 | ||
8 | # | ||
9 | # Unless required by applicable law or agreed to in writing, software | ||
10 | # distributed under the License is distributed on an "AS IS" BASIS, | ||
11 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
12 | # See the License for the specific language governing permissions and | ||
13 | # limitations under the License. | ||
14 | |||
15 | """Script to take a set of frames (PNG files) for a recovery animation | ||
16 | and turn it into a single output image which contains the input frames | ||
17 | interlaced by row. Run with the names of all the input frames on the | ||
18 | command line, in order, followed by the name of the output file.""" | ||
19 | |||
20 | import sys | ||
21 | try: | ||
22 | import Image | ||
23 | import PngImagePlugin | ||
24 | except ImportError: | ||
25 | print "This script requires the Python Imaging Library to be installed." | ||
26 | sys.exit(1) | ||
27 | |||
28 | frames = [Image.open(fn).convert("RGB") for fn in sys.argv[1:-1]] | ||
29 | assert len(frames) > 0, "Must have at least one input frame." | ||
30 | sizes = set() | ||
31 | for fr in frames: | ||
32 | sizes.add(fr.size) | ||
33 | |||
34 | assert len(sizes) == 1, "All input images must have the same size." | ||
35 | w, h = sizes.pop() | ||
36 | N = len(frames) | ||
37 | |||
38 | out = Image.new("RGB", (w, h*N)) | ||
39 | for j in range(h): | ||
40 | for i in range(w): | ||
41 | for fn, f in enumerate(frames): | ||
42 | out.putpixel((i, j*N+fn), f.getpixel((i, j))) | ||
43 | |||
44 | # When loading this image, the graphics library expects to find a text | ||
45 | # chunk that specifies how many frames this animation represents. If | ||
46 | # you post-process the output of this script with some kind of | ||
47 | # optimizer tool (eg pngcrush or zopflipng) make sure that your | ||
48 | # optimizer preserves this text chunk. | ||
49 | |||
50 | meta = PngImagePlugin.PngInfo() | ||
51 | meta.add_text("Frames", str(N)) | ||
52 | |||
53 | out.save(sys.argv[-1], pnginfo=meta) | ||