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automatically resizes and crops an image to make it suitable for use as a wallpaper. -- written by @coleifer
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| #!/usr/bin/env python | |
| import os | |
| import re | |
| import sys | |
| from PIL import Image | |
| HOME = os.environ['HOME'] | |
| try: | |
| screen_info = os.popen('xrandr').readlines() | |
| resolution_re = re.compile('\s+(\d+)x(\d+)\s+\d+\.\d+\*') | |
| for line in screen_info: | |
| match_obj = resolution_re.search(line) | |
| if match_obj: | |
| WIDTH, HEIGHT = map(int, match_obj.groups()) | |
| break | |
| except: | |
| WIDTH = 1440 | |
| HEIGHT = 900 | |
| RATIO = float(WIDTH) / HEIGHT | |
| def local_file(filename): | |
| return os.path.join(HOME, filename) | |
| def make_wallpapers(original): | |
| im = Image.open(original) | |
| width, height = im.size | |
| ratio = float(width) / height | |
| if ratio > RATIO: | |
| # resize to match height, then crop horizontally from center | |
| new_width = int(HEIGHT * ratio) | |
| im.thumbnail((new_width, HEIGHT), Image.ANTIALIAS) | |
| offset = (new_width - WIDTH) / 2 | |
| cropped = im.crop((offset, 0, offset + WIDTH, HEIGHT)) | |
| elif ratio < RATIO: | |
| # resize to match width, then crop vertically from center | |
| new_height = int(WIDTH / ratio) | |
| im.thumbnail((WIDTH, new_height), Image.ANTIALIAS) | |
| offset = (new_height - HEIGHT) / 2 | |
| cropped = im.crop((0, offset, WIDTH, offset + HEIGHT)) | |
| else: | |
| im.thumbnail((WIDTH, HEIGHT), Image.ANTIALIAS) | |
| cropped = im | |
| path, ext = os.path.splitext(original) | |
| dest_jpg = local_file('.wallpaper.jpg') | |
| dest_png = local_file('.wallpaper.png') | |
| cropped.save(dest_jpg, 'JPEG', quality=100) | |
| cropped.save(dest_png, 'PNG') | |
| def panic(msg): | |
| print >> sys.stderr, msg | |
| sys.exit(1) | |
| if __name__ == '__main__': | |
| if len(sys.argv) != 2: | |
| panic('Error, missing required image file') | |
| filename = sys.argv[-1] | |
| if not os.path.exists(filename): | |
| panic('Error, file %s not found' % filename) | |
| make_wallpapers(filename) |
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