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Rangi42
41 lines
1.1 KiB
Python
Executable File
41 lines
1.1 KiB
Python
Executable File
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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"""
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Usage: python3 dupeframes.py image.png...
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Check for duplicate frames in Pokemon sprites (vertical strips of square frames).
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Copyright (c) 2024, Rangi42
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SPDX-License-Identifier: MIT
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"""
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import sys
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import png
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def duplicate_frames(filename):
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with open(filename, 'rb') as file:
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width, height, rows = png.Reader(file).asRGBA8()[:3]
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rows = list(rows)
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if height % width:
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print(f'{filename} is not a vertical strip of square frames!', file=sys.stderr)
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return
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num_frames = height // width
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frames = [rows[i*width:(i+1)*width] for i in range(num_frames)]
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yield from ((i, j) for i in range(num_frames) for j in range(i+1, num_frames) if frames[i] == frames[j])
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def main():
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if len(sys.argv) < 2:
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print(f'Usage: {sys.argv[0]} image.png...', file=sys.stderr)
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sys.exit(1)
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for filename in sys.argv[1:]:
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if not filename.lower().endswith('.png'):
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print(f'{filename} is not a .png file!', file=sys.stderr)
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else:
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for (i, j) in duplicate_frames(filename):
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print(f'{filename}: frame {j} is a duplicate of frame {i}')
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if __name__ == '__main__':
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main()
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