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Improved efficient saving by copying the saved image, instead of saving the same image twice

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This commit is contained in:
Andrew Murray 2018-03-11 22:14:49 +11:00
parent de80b8f36b
commit 6af53a7303
1 changed files with 5 additions and 7 deletions
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12
src/PIL/IcnsImagePlugin.py
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@ -311,20 +311,18 @@ def _save(im, fp, filename):
# create the temporary set of pngs
iconset = tempfile.mkdtemp('.iconset')
last_w = None
last_im = None
for w in [16, 32, 128, 256, 512]:
prefix = 'icon_{}x{}'.format(w, w)
first_path = os.path.join(iconset, prefix+'.png')
if last_w == w:
im_scaled = last_im
shutil.copyfile(second_path, first_path)
else:
im_scaled = im.resize((w, w), Image.LANCZOS)
im_scaled.save(os.path.join(iconset, prefix+'.png'))
im.resize((w, w), Image.LANCZOS).save(first_path)
im_scaled = im.resize((w*2, w*2), Image.LANCZOS)
im_scaled.save(os.path.join(iconset, prefix+'@2x.png'))
second_path = os.path.join(iconset, prefix+'@2x.png')
im.resize((w*2, w*2), Image.LANCZOS).save(second_path)
last_w = w*2
last_im = im_scaled
# iconutil -c icns -o {} {}
from subprocess import Popen, PIPE, CalledProcessError