def backends(childprocess):
# the order is based on performance
if platform_is_linux():
if use_x_display():
if childprocess:
yield ScrotWrapper
yield PilWrapper
yield MssWrapper
else:
yield PilWrapper
yield MssWrapper
yield ScrotWrapper
yield MaimWrapper
yield ImagemagickWrapper
yield Gdk3PixbufWrapper
yield WxScreen
for x in qt():
yield x
yield GnomeDBusWrapper
# on screen notification
yield KwinDBusWrapper
# flash effect
yield GnomeScreenshotWrapper
yield GrimWrapper
elif platform_is_osx():
# first check for X
if use_x_display():
pass
else:
# fast
yield MssWrapper
# latest version should work
yield PilWrapper
# alternatives for older pillow versions
yield ScreencaptureWrapper
yield MacQuartzWrapper
# qt has some color difference
# does not work: Gdk3, wx, Imagemagick
elif platform_is_win():
# fast
yield MssWrapper
yield PilWrapper
else:
for x in backend_dict.values():
yield x
try:
from Xlib import display
except ImportError:
display = None
# https://github.com/python-xlib/python-xlib/blob/master/examples/xrandr.py#L44
def missing_RANDR():
if display:
return False
disp = display.Display()
return not disp.has_extension("RANDR")
ok = False
if not six.PY2 and check_import("mss"):
if platform_is_osx() and not use_x_display():
ok = True
if platform_is_linux() and use_x_display():
ok = True
if platform_is_win():
ok = True
if ok:
def test_mss():
if missing_RANDR():
try:
backend_to_check("mss")
except FailedBackendError:
pass
else:
from bt import backend_to_check, prog_check
from pyscreenshot.util import use_x_display
if use_x_display():
if prog_check(["maim", "--version"]):
def test_maim():
backend_to_check("maim")
from bt import backend_to_check, prog_check
from pyscreenshot.util import use_x_display
if not use_x_display():
if prog_check(["grim", "-h"]):
def test_grim():
backend_to_check("grim")
