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UselessCode/ShadowDrop

./shadow.py input.png output.png みたいにして使うと、input.png に影をつけてoutput.png をつくる。

sample.png → output.png 

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#!/usr/bin/python

import Image
import ImageChops
import ImageFilter

def main(argv):
        fromfile = argv[1]
        tofile = argv[2]

        img = Image.open(fromfile)
        img = img.convert(mode='RGBA')
        x,y = img.size
        orig = Image.new('RGBA', (x+30, y+30))
        orig.paste(img, (0,0) + img.size)

        shadow = Image.new('RGBA', (x+30, y+30))
        shadow.paste(img, (15,15, x+15, y+15))

        shadowalpha = shadow.split()[3]
        shadowalpha = shadowalpha.filter(ImageFilter.BLUR).filter(ImageFilter.BLUR).filter(ImageFilter.BLUR)
        shadowzero = Image.new('L', shadow.size, 0)
        shadow = Image.merge('RGBA', (shadowzero, shadowzero, shadowzero, shadowalpha))

        out = ImageChops.composite(orig, shadow, orig)
        out.save(file(tofile, 'w'))


if __name__ == '__main__':
        import sys
        main(sys.argv)