What did you do?
Loading an .ico of the size 256x256 and then saving it results in an .ico file of the size 255x255. I tested it on an example .ico file: http://www.axialis.com/tutorials/iw/down.ico
What did you expect to happen?
The icon file should stay the same after saving. No other adjustments have been made. See the code below.
What actually happened?
The saved .ico file ended up as 255x255 file. Because Windows doesn't support 255x255 size for .ico files, it is downscaled to 128x128 when used as desktop icons. Example. The Chromium and Chrome icons are default ones, the Chrome Canary one was saved with Pillow.
What versions of Pillow and Python are you using?
Pillow 3.4.2, Python 3.5.2
from PIL import Image
im = Image.open('down.ico')
im.save('saved.ico')
im_saved = Image.open('saved.ico')
In [2]: im.size
Out[2]: (256, 256)
In [3]: im_saved.size
Out[3]: (255, 255)(255, 255) appears on the list of sizes at https://github.com/python-pillow/Pillow/blob/master/PIL/IcoImagePlugin.py#L45 .
What did you do?
Loading an .ico of the size 256x256 and then saving it results in an .ico file of the size 255x255. I tested it on an example .ico file: http://www.axialis.com/tutorials/iw/down.ico
What did you expect to happen?
The icon file should stay the same after saving. No other adjustments have been made. See the code below.
What actually happened?
The saved .ico file ended up as 255x255 file. Because Windows doesn't support 255x255 size for .ico files, it is downscaled to 128x128 when used as desktop icons. Example. The Chromium and Chrome icons are default ones, the Chrome Canary one was saved with Pillow.
What versions of Pillow and Python are you using?
Pillow 3.4.2, Python 3.5.2
(255, 255)appears on the list of sizes at https://github.com/python-pillow/Pillow/blob/master/PIL/IcoImagePlugin.py#L45 .