54 lines
1.9 KiB
Python
54 lines
1.9 KiB
Python
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# Copyright (C) 2014 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Script to take a set of frames (PNG files) for a recovery animation
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and turn it into a single output image which contains the input frames
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interlaced by row. Run with the names of all the input frames on the
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command line, in order, followed by the name of the output file."""
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import sys
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try:
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import Image
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import PngImagePlugin
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except ImportError:
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print "This script requires the Python Imaging Library to be installed."
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sys.exit(1)
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frames = [Image.open(fn).convert("RGB") for fn in sys.argv[1:-1]]
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assert len(frames) > 0, "Must have at least one input frame."
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sizes = set()
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for fr in frames:
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sizes.add(fr.size)
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assert len(sizes) == 1, "All input images must have the same size."
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w, h = sizes.pop()
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N = len(frames)
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out = Image.new("RGB", (w, h*N))
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for j in range(h):
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for i in range(w):
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for fn, f in enumerate(frames):
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out.putpixel((i, j*N+fn), f.getpixel((i, j)))
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# When loading this image, the graphics library expects to find a text
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# chunk that specifies how many frames this animation represents. If
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# you post-process the output of this script with some kind of
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# optimizer tool (eg pngcrush or zopflipng) make sure that your
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# optimizer preserves this text chunk.
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meta = PngImagePlugin.PngInfo()
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meta.add_text("Frames", str(N))
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out.save(sys.argv[-1], pnginfo=meta)
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