def get_core_encodings(self):
encodings = GTKXpraClient.get_core_encodings(self)
if gdk.screen_get_default().get_rgba_visual() is not None:
try:
#check for bytearray which is used by PixmapBacking
#to unpremultiply rgb32 data
bytearray("")
from xpra.codecs.argb.argb import unpremultiply_argb_in_place
assert unpremultiply_argb_in_place
encodings.append("rgb32")
except:
pass
#gtk2 can handle 'png' and 'jpeg' natively (without PIL)
#(though using PIL is better since we can do that in the decode thread)
for x in ("png", "jpeg"):
if x not in encodings:
encodings.append(x)
return encodings
