90 lines
2.9 KiB
Python
Executable File
90 lines
2.9 KiB
Python
Executable File
#!/usr/bin/env python3
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#
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# compress-pngs.py - Compress PNGs
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#
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# By Gerald Combs <gerald@wireshark.org
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#
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# SPDX-License-Identifier: GPL-2.0-or-later
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#
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'''Run various compression and optimization utilities on one or more PNGs'''
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import argparse
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import concurrent.futures
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import shutil
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import subprocess
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import sys
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PNG_FILE_ARG = '%PNG_FILE_ARG%'
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def get_compressors():
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# Add *lossless* compressors here.
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compressors = {
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# https://github.com/shssoichiro/oxipng
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'oxipng': { 'args': ['--opt', 'max', '--strip', 'safe', PNG_FILE_ARG] },
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# http://optipng.sourceforge.net/
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'optipng': { 'args': ['-o3', '-quiet', PNG_FILE_ARG] },
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# https://github.com/amadvance/advancecomp
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'advpng': { 'args': ['--recompress', '--shrink-insane', PNG_FILE_ARG] },
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# https://github.com/amadvance/advancecomp
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'advdef': { 'args': ['--recompress', '--shrink-insane', PNG_FILE_ARG] },
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# https://pmt.sourceforge.io/pngcrush/
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'pngcrush': { 'args': ['-q', '-ow', '-brute', '-reduce', '-noforce', PNG_FILE_ARG, 'pngcrush.$$$$.png'] },
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# https://github.com/fhanau/Efficient-Compression-Tool
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'ect': { 'args': ['-5', '--mt-deflate', '--mt-file', '-strip', PNG_FILE_ARG]}
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}
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for compressor in compressors:
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compressor_path = shutil.which(compressor)
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if compressor_path:
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compressors[compressor]['path'] = compressor_path
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return compressors
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def compress_png(png_file, compressors):
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for compressor in compressors:
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if not compressors[compressor].get('path', False):
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continue
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args = compressors[compressor]['args']
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args = [arg.replace(PNG_FILE_ARG, png_file) for arg in args]
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try:
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compress_proc = subprocess.run([compressor] + args)
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except Exception:
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print('{} returned {}:'.format(compressor, compress_proc.returncode))
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def main():
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parser = argparse.ArgumentParser(description='Compress PNGs')
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parser.add_argument('--list', action='store_true',
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help='List available compressors')
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parser.add_argument('png_files', nargs='*', metavar='png file', help='Files to compress')
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args = parser.parse_args()
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compressors = get_compressors()
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c_count = 0
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for compressor in compressors:
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if 'path' in compressors[compressor]:
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c_count += 1
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if c_count < 1:
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sys.stderr.write('No compressors found\n')
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sys.exit(1)
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if args.list:
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for compressor in compressors:
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path = compressors[compressor].get('path', 'Not found')
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print('{}: {}'.format(compressor, path))
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sys.exit(0)
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with concurrent.futures.ProcessPoolExecutor() as executor:
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futures = []
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for png_file in args.png_files:
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print('Compressing {}'.format(png_file))
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futures.append(executor.submit(compress_png, png_file, compressors))
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concurrent.futures.wait(futures)
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if __name__ == '__main__':
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main()
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