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Background Context Extractor commandline tool, automatic version for GNOME
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Automatically takes one screenshot with white, and one with shadow-color
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(usually black), background. Puts out a PNG image with transparent desktop.
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This is usefull for evaluationg wallpapers that should go well with panels
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and themes other than the one you are currently using.
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Based on a bash script by Sergey Davidoff
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Copyright 2010, 2011 Thorsten Wilms, Sergey Davidoff
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License: GPLv3, see docs/COPYING
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This program is free software: you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation, either version 3 of the License, or (at your option) any later
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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import argparse # Added with Python 2.7, not present in 3.0 but back in 3.2
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from os.path import isdir, exists
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from sys import stdout, stderr, exit
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from time import sleep
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from subprocess import call
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from backtestground.cli_input import try_parse
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import backtestground.extract_background_context as extract_background_context
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"""Run program and handle command line options"""
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# Default output filename
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filename = "context.png"
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help_text = """destination directory or filename. \".png\" will be appended
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to given filename, if missing. Defaults to %s.""" % filename
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parser = argparse.ArgumentParser(description="""Create image with
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transparent desktop from 2 screenshots with white and shadow-color
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(usually black) desktops.""")
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parser.add_argument('-v', '--version',
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version='%(prog)s 1.3',
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help="print program version")
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parser.add_argument('-o',
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# no type=file, as that would require
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# the file to exist beforehand.
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metavar='path/filename',
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parser.add_argument('-f', '--force',
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help="""overwrite existing files,
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do not creat a backup.""")
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# Catch IOErrors to put out a _short_ error message
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args = try_parse(parser)
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# Special care for 'output'
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if isdir(args.output):
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# args.output specifies a directory, so append the default filename.
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output = ''.join([args.output, "/", filename])
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# args.output specifies a file,
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# so make sure the name ends with ".png" (or ".PNG").
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if args.output.endswith(".png") or args.output.endswith(".PNG"):
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output = ''.join([args.output, ".png"])
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client = gconf.client_get_default()
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stderr.write("Can't access gconf. Maybe not running from within a GNOME session?\n")
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stdout.write("Taking screenshots in 3 seconds\n")
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for i in range(3, 0, -1):
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stdout.write(''.join([str(i), "\n"]))
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gconfs = ('/desktop/gnome/background/picture_filename',
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'/desktop/gnome/background/color_shading_type',
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'/desktop/gnome/background/primary_color')
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# Save initial settings
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before = map(client.get_string, gconfs)
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# Find unused filenames
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name = ''.join([name, str(n), '.png'])
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if not exists(name): break
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filename_seeds = ('on_white', 'on_black')
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files = map(unused, filename_seeds)
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# Switch to no-picture/solid/white, wait for transition,
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values = ('', 'solid', '#ffffffffffff')
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map(client.set_string, gconfs, values)
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call("import -window root %s" % files[0], shell=True)
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# Switch to black, wait for transition, take screenshot
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client.set_string(gconfs[2], '#000000000000')
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call("import -window root %s" % files[1], shell=True)
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map(client.set_string, gconfs, before)
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extract_background_context.extract(files[0], files[1],
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output, args.overwrite)
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if __name__ == '__main__':
added
removed
backtestground-0.4-0ubuntu1/bin/extract-background-context-gnome
