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annotate bin/recompress @ 386:8438e85e1490

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Added comment.
author Edho Arief <edho@myconan.net>
date Thu, 26 Jul 2012 12:37:39 +0700
parents 97e24e89388f
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
Edho Prima Arief <edho@myconan.net>
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1 #!/usr/bin/env python
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2
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
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3 import sys, os
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4 from PIL import Image
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5
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6
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a5324d2cc0eb Updated documentation.
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7 # Raises a generic exception (exception.Exception) if input is not a PNG file.
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03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
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8 def repng(filename):
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4f954c1e2fdc Stop being pretentious and only return 0 or 1 in case of success or failure. Everything else is handled by exception handler.
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9 im = Image.open(filename)
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10 if im.format == "PNG":
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9790bc126ea6 Epic simplified error handling in true try/except/finally spirit.
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11 im.save(filename, "PNG", optimize=1)
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12 else:
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13 raise Exception("Not a PNG image file")
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14
03b02463cc16 omg python, recompresses image files. Because mplayer's png writer doesn't write compressed png.
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15 def hbytes(inbyte):
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16 units = ["B", "kB", "MB", "GB", "TB", "PB"]
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17 outbyte = float(inbyte)
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18 current_unit = 0
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19 while outbyte > 1000:
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20 outbyte /= 1000
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21 current_unit += 1
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22 return "%.2f %s" % (outbyte, units[current_unit])
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23
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9be628347dce Worst thing about unix: it allows control character and newline in its filename. Added handler to ensure that shit doesn't pass through. Makes things slow but it can't be helped (tm).
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24 def sane_fn(filename):
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25 import re
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26 return re.sub(r"[\x00-\x1F\x7F\n\r]", "?", filename)
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27
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28 def main(files):
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29 for filename in files:
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30 print "Recompressing %s:" % sane_fn(filename),
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31 sys.stdout.flush()
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32 try:
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33 byte_orig = os.path.getsize(filename)
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9790bc126ea6 Epic simplified error handling in true try/except/finally spirit.
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34 repng(filename)
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35 byte_new = os.path.getsize(filename)
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36 print "OK (%s => %s, %.2f%% saving)" % (hbytes(byte_orig), hbytes(byte_new), (byte_orig - byte_new)*100/float(byte_orig)),
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37 re = 0
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38 except:
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39 print "Failed",
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40 print "(%s: %s)" % (sys.exc_type, sys.exc_value),
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41 re = 1
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9790bc126ea6 Epic simplified error handling in true try/except/finally spirit.
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42 finally:
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43 print "[%s]" % re
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44
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45 if __name__ == "__main__":
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46 main(sys.argv[1:])