Captures screenshots and displays them

screenie.py

#!/usr/bin/env python

#
# Capture and display screenshots.
# Requires ImageMagick, PIL and PyGame.
#

import os
import pygame
from pygame.locals import *


__author__ = 'Sarah Mount'
__date__ = 'Feb 2011'


def get_screen_resolution(fname='screen.jpg'):
    # Uses Python Image Library
    import Image
    cmd = "import -window root %s" % fname
    os.system(cmd)
    im = Image.open(fname)
    return im.size
    

def get_shot(fname='screen.jpg'):
    # Grab a single screenshot
    # Just to find the screen resolution
    # We could use ImageGrab from the PIL libraries, 
    # but currently they are Windows only.
    cmd = "import -window root %s" % fname
    os.system(cmd)
    surface = pygame.image.load(fname)
    surface.convert() # Makes blitting a bit faster
    return surface


def screenie():
    # Set up PyGame
    pygame.init()
    display = pygame.display.set_mode(get_screen_resolution(), 0)

    while True:
        capture = get_shot()
        print 'Bliting screenshot'
        display.blit(capture, (0,0))
        # Deal with QUIT events
        for e in pygame.event.get():
            if e.type == QUIT:
                return


if __name__ == '__main__':
    screenie()