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smartdisplay.py

import logging
import time

from PIL import Image, ImageChops
from PIL.ImageGrab import grab

from pyvirtualdisplay import Display

log = logging.getLogger(__name__)

class DisplayTimeoutError(Exception):
    pass

def autocrop(im, bgcolor):
    """Crop borders off an image.

:param im: Source image.
    :param bgcolor: Background color, using either a color tuple.
    :return: An image without borders, or None if there's no actual content in the image.
    """
    if im.mode != "RGB":
        im = im.convert("RGB")
    bg = Image.new("RGB", im.size, bgcolor)
    diff = ImageChops.difference(im, bg)
    bbox = diff.getbbox()
    if bbox:
        return im.crop(bbox)
    return None  # no contents

class SmartDisplay(Display):
    def autocrop(self, im):
        """Crop borders off an image.

:param im: Source image.
        :return: An image without borders, or None if there's no actual content in the image.
        """
        return autocrop(im, self._bgcolor)

def grab(self, autocrop=True):
        # TODO: use Xvfb fbdir option for screenshot
        img = grab(xdisplay=self.new_display_var)

if autocrop:
            img = self.autocrop(img)
        return img

def waitgrab(self, timeout=60, autocrop=True, cb_imgcheck=None):
        """start process and create screenshot.
        Repeat screenshot until it is not empty and
        cb_imgcheck callback function returns True
        for current screenshot.

:param autocrop: True -> crop screenshot
        :param timeout: int
        :param cb_imgcheck: None or callback for testing img,
                            True = accept img,
                            False = reject img
        """
        t = 0
        sleep_time = 0.3  # for fast windows
        repeat_time = 0.5
        while 1:
            log.debug("sleeping %s secs" % str(sleep_time))
            time.sleep(sleep_time)
            t += sleep_time
            img = self.grab(autocrop=False)
            img_crop = self.autocrop(img)
            if autocrop:
                img = img_crop
            if img_crop:
                if not cb_imgcheck:
                    break
                if cb_imgcheck(img):
                    break
            sleep_time = repeat_time
            repeat_time += 0.5  # progressive
            if t > timeout:
                msg = "Timeout! elapsed time:%s timeout:%s " % (t, timeout)
                raise DisplayTimeoutError(msg)
                # break

log.debug("screenshot is empty, next try..")
        assert img
        #        if not img:
        #            log.debug('screenshot is empty!')
        return img

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	0/0	0755	2026-02-11 05:02:23
..	dir	-	0/0	0755	2026-04-25 04:05:27
__pycache__	dir	-	0/0	0755	2026-02-11 05:02:23
examples	dir	-	0/0	0755	2026-02-11 05:02:23
__init__.py	text/x-script.python	241 B	0/0	0644	2026-01-20 01:01:47
about.py	text/plain	20 B	0/0	0644	2026-01-20 01:01:47
abstractdisplay.py	text/x-script.python	12.29 KB	0/0	0644	2026-01-20 01:01:47
display.py	text/x-script.python	3.18 KB	0/0	0644	2026-01-20 01:01:47
py.typed	application/x-empty	0 B	0/0	0644	2026-01-20 01:01:47
smartdisplay.py	text/x-script.python	2.6 KB	0/0	0644	2026-01-20 01:01:47
util.py	text/x-script.python	486 B	0/0	0644	2026-01-20 01:01:47
xauth.py	text/plain	1.14 KB	0/0	0644	2026-01-20 01:01:47
xephyr.py	text/x-script.python	1.6 KB	0/0	0644	2026-01-20 01:01:47
xvfb.py	text/x-script.python	1.9 KB	0/0	0644	2026-01-20 01:01:47
xvnc.py	text/x-script.python	1.87 KB	0/0	0644	2026-01-20 01:01:47

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