def verify_capture(self, ss):
#verify capture works:
log("verify_capture(%s)", ss)
try:
capture = GTKImageCapture(self.root)
bdata = capture.take_screenshot()[-1]
nid = XPRA_DISPLAY_NOTIFICATION_ID
title = body = ""
if any(b != 0 for b in bdata):
log("verify_capture(%s) succeeded", ss)
if is_Wayland():
title = "Wayland Session Warning"
body = "Wayland sessions are not supported,\n"+\
"the screen capture is likely to be empty"
else:
log.warn("Warning: shadow screen capture is blank")
body = "The shadow display capture is blank"
if get_loaded_kernel_modules("vboxguest", "vboxvideo"):
body += "\nthis may be caused by the VirtualBox video driver."
title = "Shadow Capture Failure"
log("verify_capture: title=%r, body=%r", ss, title, body)
if title and body:
ss.may_notify(nid, title, body, icon_name="server")
except Exception as e:
ss.may_notify(nid,
"Shadow Error",
"Error shadowing the display:\n%s" % e,
icon_name="bugs")
def do_make_screenshot_packet(self):
capture = GTKImageCapture(self.root)
w, h, encoding, rowstride, data = capture.take_screenshot()
assert encoding == "png" #use fixed encoding for now
from xpra.net.compression import Compressed
return [
"screenshot", w, h, encoding, rowstride,
Compressed(encoding, data)
]