def childprocess_backend_version(backend):
p = run_mod_as_subproc("pyscreenshot.cli.print_backend_version", [backend])
if p.return_code != 0:
log.warning(p)
raise FailedBackendError(p)
return p.stdout
def childprocess_grab(backend, bbox):
with TemporaryDirectory(prefix="pyscreenshot") as tmpdirname:
filename = os.path.join(tmpdirname, "screenshot.png")
cmd = ["--filename", filename]
if bbox:
x1, y1, x2, y2 = map(str, bbox)
bbox = ":".join(map(str, (x1, y1, x2, y2)))
cmd += ["--bbox", bbox]
if backend:
cmd += ["--backend", backend]
if log.isEnabledFor(logging.DEBUG):
cmd += ["--debug"]
p = run_mod_as_subproc("pyscreenshot.cli.grab", cmd)
if p.return_code != 0:
# log.debug(p)
raise FailedBackendError(p)
data = open(filename, "rb").read()
data = codec[1](data)
return data
def auto(bbox, childprocess):
im = None
for backend_class in backends(childprocess):
backend_name = backend_class.name
try:
if select_childprocess(childprocess, backend_class):
log.debug('running "%s" in child process', backend_name)
im = childprocess_grab(backend_name, bbox)
else:
obj = backend_class()
im = obj.grab(bbox)
break
except Exception:
msg = traceback.format_exc()
log.debug(msg)
if not im:
msg = "All backends failed!"
raise FailedBackendError(msg)
return im